Technical Service Bulletins (TSBs) for the 2012 Sienna are official communications between Toyota & their dealerships that describe processes for troubleshooting or fixing certain common problems.
All vehicle manufacturers are required by U.S. law to make their TSBs available to the public.
"TSB: REVISION NOTICE - AUGUST 2, 2016 REV1 - APPLICABILITY HAS BEEN UPDATED TO INCLUDE 2015 - 2016 MODEL YEAR SIENNA VEHICLES. ANY PREVIOUS PRINTED VERSIONS OF THIS BULLETIN SHOULD BE DISCARDED. Read More »
TT: THE VEHICLE MAY BE DIFFICULT TO START OR HAVE AN ABNORMALLY LOW OR ROUGH IDLE AFTER THE BATTERY HAS BEEN DISCONNECTED OR POWER TO THE ENGINE ECM HAS BEEN INTERRUPTED. Read More »
"TSB: FLASH REPROGRAMMING ALLOWS THE ECU SOFTWARE TO BE UPDATED WITHOUT REPLACING THE ECU. FLASH CALIBRATION UPDATES FOR SPECIFIC VEHICLE MODELS/ECUS ARE RELEASED AS FIELD-FIX PROCEDURES DESCRIBED IN INDIVIDUAL SERVICE BULLETINS. Read More »
TOYOTA: THERE IS A KNOCKING OR RATTLING NOISE COMING FROM ENGINE COMPARTMENT, FOR A SHORT PERIOD OF TIME, AFTER A COLD SOAK STARTUP. MODEL 2010-2012 CAMRY, 2009-2013 HIGHLANDER, VENZA, 2009-2012 RAV4, 2011-2013 SIENNA. Read More »
TOYOTA: ON CERTAIN VEHICLES, A KNOCK OR RATTLE NOISE, COMING FROM ENGINE COMPARTMENT, IS HEARD DURING A COLD SOAK STARTUP, AND THE CONDITION LASTS APPROXIMATELY ONE SECOND. MODEL YEARS 2009-2012 CAMRY, HIGHLANDER, SIENNA, VENZA, RAV4. Read More »
TOYOTA: CHARGING SYSTEM INOPERATIVE. SOME ENGINES MAY EXHIBIT INSUFFICIENT CHARGING PERFORMANCE FROM THE ALTERNATOR. AN UPDATED PULLEY ASSEMBLY IS AVAILABLE TO ADDRESS THIS CONDITION. *JS Read More »
TT: THE VEHICLE MAY BE DIFFICULT TO START OR HAVE AN ABNORMALLY LOW OR ROUGH IDLE AFTER THE BATTERY HAS BEEN DISCONNECTED OR POWER TO THE ENGINE ECM HAS BEEN INTERRUPTED. Read More »
"TSB: FLASH REPROGRAMMING ALLOWS THE ECU SOFTWARE TO BE UPDATED WITHOUT REPLACING THE ECU. FLASH CALIBRATION UPDATES FOR SPECIFIC VEHICLE MODELS/ECUS ARE RELEASED AS FIELD-FIX PROCEDURES DESCRIBED IN INDIVIDUAL SERVICE BULLETINS. Read More »
TOYOTA: CHARGING SYSTEM INOPERATIVE. SOME ENGINES MAY EXHIBIT INSUFFICIENT CHARGING PERFORMANCE FROM THE ALTERNATOR. AN UPDATED PULLEY ASSEMBLY IS AVAILABLE TO ADDRESS THIS CONDITION. *JS Read More »
TOYOTA: IN A COLLISION, TO HELP REDUCE INJURIES, WITH SEAT BELT PRE=TENSIONERS AND SUPPLEMENTAL RESTRAINT SYSTEMS (SRS), ITS POSSIBLE THAT THE DEVICES MAY OR MAY NOT PERFORM AS EXPECTED WITH UNINTENDED DEPLOYMENT. MODEL YEARS 1990-2013. Read More »
TOYOTA: AN INTERMITTENT EXHIBITION OF SRS LAMP ON WITH DIAGNOSTIC TROUBLE CODE (DTC) B1821 AND/OR B1826 CONDITION. IMPROVEMENT TO TERMINAL CRIMPING OF SIDE AIR BAG TO ADDRESS SITUATION. MODEL 2011-2012 SIENNA. Read More »
TOYOTA: IN A COLLISION, TO HELP REDUCE INJURIES, WITH SEAT BELT PRE=TENSIONERS AND SUPPLEMENTAL RESTRAINT SYSTEMS (SRS), ITS POSSIBLE THAT THE DEVICES MAY OR MAY NOT PERFORM AS EXPECTED WITH UNINTENDED DEPLOYMENT. MODEL YEARS 1990-2013. Read More »
TT: SLIDING DOOR WILL NOT LATCH IN THE CLOSED POSITION DUE TO EITHER FRONT AND/OR REAR LOCK MALFUNCTIONING. PLEASE SEE LINK REFERENCES OF VIDEO FOR EXAMPLE CONDITION AND DIAGNOSIS INSTRUCTION. Read More »
TT: SLIDING DOOR WILL NOT LATCH MANUALLY IN THE CLOSED POSITION DUE TO EITHER THE FRONT AND OR/REAR LOCK MALFUNCTIONING. PLEASE SEE LINK REFERENCES OF VIDEO FOR EXAMPLE CONDITION. Read More »
TT: SLIDING DOOR WILL NOT LATCH IN THE CLOSED POSITION DUE TO EITHER FRONT AND/OR REAR LOCK MALFUNCTIONING. PLEASE SEE LINK REFERENCES OF VIDEO FOR EXAMPLE CONDITION AND DIAGNOSIS INSTRUCTION. Read More »
TT: SLIDING DOOR WILL NOT LATCH MANUALLY IN THE CLOSED POSITION DUE TO EITHER THE FRONT AND OR/REAR LOCK MALFUNCTIONING. PLEASE SEE LINK REFERENCES OF VIDEO FOR EXAMPLE CONDITION. Read More »
TOYOTA: ACCELERATOR PEDAL SENSOR ASSEMBLY INFORMATION REGARDING THE INSPECTION, REMOVAL, AND INSTALLATION, IF LUBRICATION OR OIL, IS APPLIED. *PE Read More »
TSB: SOME 2011 ? 2015 MODEL YEAR SIENNA VEHICLES MAY EXHIBIT A CONDITION WHERE THE DRIVER SIDE 2ND ROW SEAT WITH THE TIP-UP STYLE LOWER SEAT CUSHION HAS EXCESSIVE UP AND DOWN MOVEMENT. Read More »
TSB: ON SOME VEHICLES, WHEN RAPGARD? IS REMOVED, THE PAINT MAY HAVE A STAINED APPEARANCE. THESE STAINS APPEAR TO BE UNDER THE CLEAR COAT (REPAINTING THIS AREA IS NOT NECESSARY). Read More »
"TT: SOME CUSTOMERS MAY ENCOUNTER BLUETOOTH CONNECTIVITY CONCERNS SUCH AS: ? DIFFICULTY PAIRING THE PHONE. ? INTERMITTENT BLUETOOTH FAILURE TO CONNECT WHEN FIRST TURNING ON THE VEHICLE. Read More »
TT: CUSTOMERS MAY EXPERIENCE CONNECTIVITY ISSUES WHEN THE FOLLOWING CONDITIONS ARE MET: THE CUSTOMER'S IPHONE IS OPERATING ON IOS9 FIRMWARE. THE CUSTOMER'S IPHONE IS CONNECTED TO THE VEHICLE VIA BLUETOOTH. Read More »
TOYOTA: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. A PROGRAM ERROR, IN DRIVING SUPPORT ECU, HAS RADAR SENSOR PRE-COLLISION SYSTEM (PCS) INACTIVE 10 SECONDS OR MORE, WHILE STOPPED, WILL FAIL TO REACTIVATE PRE-COLLISION BRAKING. Read More »
TT: CUSTOMERS MAY EXPERIENCE CONNECTIVITY ISSUES WHEN THE FOLLOWING CONDITIONS ARE MET: THE CUSTOMER'S IPHONE IS OPERATING ON IOS9 FIRMWARE. THE CUSTOMER'S IPHONE IS CONNECTED TO THE VEHICLE VIA BLUETOOTH. Read More »
Some users may experience no sound from the Pandora or iHeartRadio Entune Applications after attaching the iPhone USB cable to the multimedia system. Read More »
